This book is not about my son. It contains the thoughts and conclusions of my son. The characters and the world are artificial. However, there are a lot of real impressions that were used in the story. And it describes not the school system but the consequences of its degradation and seeks the ways to correct this.

Or case was quite specific and it is not described in the book. And to understand what do I mean about Greta you need to read through the book till the 31st chapter. This phenomenon is also one of the consequences.

By the way, the weirdest complaint of the Swiss school was that my other son knows the German (Hochdeutsch) too well.